The upload seems to be much more sensitive to PC setup. There is also a QOS setting within the modem that reserves a bit of upstream bandwidth. I find that my old windows 2003 server gives the best upstream speed at around 16Mb whereas my windows 7 PC's only manage 13Mb.

7mb does sound low, what does the BTW checker say about your expected speeds? Mine are 41.3 / 6.5 modem currently synced at 59999 / 20000.

You should make sure that your 8m of RJ11 are twisted (round cable) rather than flat.

I too am very happy, 3 months ago I had 4.5M / 500K ADSL, then went to 40 / 10 and now getting 55 / 20, if only the next speed upgrade was a couple of months away.

Mark.

Mark.

OK, slight egg on face. Plugging the computer straight into the BT modem, I get a straight 50Mbps down and 8Mbps up. So the problem is with my router, or more likely its configuration.

It's a fairly recent Draytek (Vigor 2820Vg), so it should be up to the job. The router setup is quite tricky, with eight IPs from Zen and lots of NAT (multiple servers), so I suppose I could simply have got it wrong; ah well.

Paul

Well, duh! This router has a page to set bandwidth limits. For some reason (i.e. I've no idea why) I had set it to the maximum speeds that I could expect under 21CN (20Mbps/1.2Mbps), and it's been doing its job as designed ever since. I also increased the router's MTU setting from 1442 to 1492. Everything in the garden's rosy.

Paul

Glad to hear its all sorted.

Mark.

I'm just curious, now that it's working. What determines the upstream limit, relative to the downstream? Can you predict the upstream that is likely to be possible given the achieved downstream speed? Given that my downstream is now just over 50Mbps, is an upstream of 7.5Mbps as expected, or more, or less?

Paul